Lightroom Classic: Sscrambling my titles and captions

Since I upgraded to Lr Classic my titles and captions are being scrambled. I add them to one or several images and then they add themselves to other completely irrelevant images. This never happened before. Now it is happening a lot. This is a nightmare. I composed the info in the catalog and now it's gone. I only noticed the switch when I added the images to my website. They change without warning.

Thanks so much for your quick replies. I am so frustrated. To reply first to Victoria. Yes, I am syncing these photos with the cloud. The images were in a Collection together. The titles and captions were added via my desktop PC, but they are synced onto my android tablet. Was that a mistake? I have added some titles and captions to other images on the tablet, but they are not relevant to these images. Should I stop doing that? Should I stop syncing at all? What do you suggest. I am hoping to only reset the Preferences as a last resort.

I've heard one other report of captions getting corrupted in the last few days, and it looks like that's sync related. I'll flag your thread up with that other account. No harm in trying to reset prefs and/or ago syncing too, to narrow down the cause further.

Thanks once again. Autocorrect sounds like such a good idea, but ... I've rebooted my PC. I'll try an experiment with Lr. Make a new Collection, enter rubbish metadata and see what happens synced and unsynced. I'll do this tomorrow when I'm feeling fresher (I live in the uk, so it's late now).

I've just been trying to turn sync off the Collection that I have been having the problem with. When I click the sync sign off the Collection in the Collections Panel, it turns into a rectangle, but the sync sign remains on the individual images and I can't find any way to turn it off. I tried looking in 'Help', but that isn't working either. So, how can I unsync synced images in an unsynced Collection?

I just figured out how to unsync images within unsynced collections by going to 'all synced photos' etc... This is insanely complicated. I'm beginning to think that using sync at all (at this point in time) is a bad idea.

I spent most of the weekend trying to sort out my metadata. Eventually I found copies of the images that had been backed up. As you suggested, I turned off sync. But since I can't be sure when the files were corrupted, I can't be sure that syncing was the problem. For example I found an image in which the title had been replaced by --. I'm wondering if that isn't a different problem. For example, if I had moved away from the image in question to do something else which involved typing 2 hyphens. And then a new bug which causes it to be impossible to check keywords from my list. After I restarted Lr, the keywording seemed ok. In other words, I am concerned that things are going wrong all over the place with Ps, Lr and Br. And that I am only finding these problems by chance. I am sharing several Collections with other people, but now the syncing is off. Should I find another way to share with them. Should I be copying my images to the Lr web space allotted to me? or use Dropbox, for example? Under the circumstances, I think that Adobe should be improving its communication skills. Thanks very much for your help.

If you don't think it's sync, by all means turn it back on now. It was just a quick experiment to see if it carries on happening with it on - or stops when it's off. Has it happened again with it turned off? If not, I'd back up the catalog, turn it back on and see if it happens again.

What I think that I was trying to say was that you were probably right and that the syncing is the problem. But I'm nervous about testing it in case more things change without my knowledge. I've been adding metadata to images I've been taking for over 40 years. Trying to remember relevant info, at best, is difficult. Trying to repair my metadata after it's been scrambled by Adobe is seriously nightmarish. So, at the moment, I'm keeping the syncing off until either there is an upgrade or until I get some explanation for what has gone wrong. Thanks for your help.

I have done that a couple of times since this has all been happening. Also, all my drives are backed up every couple of days or more. Of course, it's not possible to make too many backups - as long as you can find them when you need them!